Listener LettersThursday is the day that ATC reads from listener responses. Among the topics: displeasure with Bob Garfield's piece about the Washington, D.C., primary; a child's view of space; and coverage of a deadly attack by a mountain lion. Send letters to: atc@npr.org.

Thursday is the day that ATC reads from listener responses. Among the topics: displeasure with Bob Garfield's piece about the Washington, D.C., primary; a child's view of space; and coverage of a deadly attack by a mountain lion. Send letters to: atc@npr.org.